When the Russian army marches through Ukraine, they may just be met a battalion made up of “babushkas.” A group of older women has been volunteering in Ukraine since Russian separatists began conflict in the country eight years ago. During the conflict between Ukranian nationalists and Russian separatists in eastern Ukraine’s Donbas, these women have helped move supplies, provide medical care and build a lookout tower. Now, the Russian army has invaded. On Feb. 14, 79-year-old Valentyna Konstantinovska already knew a Russian invasion of a wider scale was a possibility. She said she would not hesitate to fight when it...